Japanese Knotweed Removal in South Wales
County-wide surveys, herbicide programmes and full excavation for homeowners, landlords, developers and public bodies across South Wales. Send photographs for free species confirmation; a professional on-site survey with a written report starts from £250 and is credited against the works if you proceed.
Fast site visits
Surveyors covering South Wales and neighbouring counties.
10-year guarantee
Insurance-backed and transferable on sale.
£10m liability cover
Licensed carrier disposal on every excavation.
Why knotweed spreads in South Wales
The South Wales valleys have the highest recorded knotweed density in the UK. Former colliery land, tips and railway routes gave the plant an unbroken corridor through the valleys, and terraced housing built tight against those slopes means most infestations here are shared between several owners.
Main local pressure: Ex-colliery land, valley railway routes and shared terraced boundaries.
South Wales knotweed coverage map
Our surveyors work across the whole of South Wales. The map below shows the county we cover for Japanese knotweed surveys, herbicide programmes and excavation, where the main local pressure is ex-colliery land, valley railway routes and shared terraced boundaries.
Towns and surrounding villages
- Cardiff
- Swansea
- Newport
- Bridgend
- Neath
- Port Talbot
- Llanelli
- Carmarthen
- Merthyr Tydfil
- Aberdare
- Pontypridd
- Caerphilly
- Blackwood
- Tredegar
- Ebbw Vale
- Maesteg
- Porthcawl
- Barry
- Penarth
- Pontypool
- Cwmbran
- Chepstow
- Monmouth
- Abergavenny
- Ammanford
- Gorseinon
- Llantrisant
- Ystradgynlais
Every location marked on the South Wales map is served directly, including Cardiff, Swansea, Newport, Bridgend, Neath, Port Talbot, Llanelli, Carmarthen, Merthyr Tydfil, Aberdare, Pontypridd, Caerphilly, Blackwood, Tredegar, Ebbw Vale, Maesteg, Porthcawl, Barry, Penarth, Pontypool, Cwmbran, Chepstow, Monmouth, Abergavenny, Ammanford, Gorseinon, Llantrisant and Ystradgynlais — plus the villages, hamlets and rural parishes between them.
Towns and villages we cover in South Wales
Each town page has its own coverage map, local knotweed context and the villages and hamlets around it that our surveyors work in.
Japanese knotweed removal in Cardiff
CF10, CF11, CF14 · Llandaff, Whitchurch, Radyr, Tongwynlais
Japanese knotweed removal in Swansea
SA1, SA2 · Morriston, Llansamlet, Clydach, Mumbles
Japanese knotweed removal in Newport
NP19, NP20 · Caerleon, Rogerstone, Bettws, Malpas
Japanese knotweed removal in Bridgend
CF31, CF32 · Coity, Pencoed, Coychurch, Laleston
Japanese knotweed removal in Merthyr Tydfil
CF47, CF48 · Troedyrhiw, Aberfan, Treharris, Dowlais
Japanese knotweed removal in Pontypridd
CF37 · Treforest, Rhydyfelin, Cilfynydd, Glyncoch
Japanese knotweed removal in Caerphilly
CF83 · Bedwas, Trethomas, Machen, Ystrad Mynach
Japanese knotweed removal in Ebbw Vale
NP23 · Beaufort, Cwm, Waunlwyd, Victoria
Japanese knotweed removal in Neath
SA10, SA11 · Briton Ferry, Skewen, Baglan, Resolven
Japanese knotweed removal in Port Talbot
SA12, SA13 · Margam, Taibach, Cwmavon, Pontrhydyfen
Japanese knotweed removal in Llanelli
SA14, SA15 · Burry Port, Pembrey, Felinfoel, Pwll
Japanese knotweed removal in Carmarthen
SA31, SA32 · Abergwili, Bronwydd, Llangunnor, Johnstown
Japanese knotweed removal in Barry
CF62, CF63 · Barry Island, Cadoxton, Wenvoe, Sully
Japanese knotweed removal in Penarth
CF64 · Llandough, Cogan, Dinas Powys, Sully
Japanese knotweed removal in Chepstow
NP16 · Tutshill, Bayfield, Mathern, Sedbury
Japanese knotweed removal in Monmouth
NP25 · Wyesham, Dixton, Osbaston, Over Monnow
Japanese knotweed removal in Abergavenny
NP7 · Llanfoist, Govilon, Gilwern, Llanover
Japanese knotweed removal in Blackwood
NP12 · Pontllanfraith, Ystrad Mynach, Crosskeys, Cwmfelinfach
Japanese knotweed removal in Tredegar
NP22 · Sirhowy, Georgetown, Dukestown, Bedwellty
Japanese knotweed removal in Aberdare
CF44 · Cwmbach, Aberaman, Trecynon, Penywaun
Japanese knotweed removal in Maesteg
CF34 · Caerau, Nantyffyllon, Llangynwyd, Garth
Japanese knotweed removal in Porthcawl
CF36 · Kenfig Hill, Pyle, North Cornelly, South Cornelly
Japanese knotweed removal in Pontypool
NP4 · Abersychan, Garndiffaith, Talywain, Trevethin
Japanese knotweed removal in Cwmbran
NP44 · Pontnewydd, Croesyceiliog, Llanyrafon, Fairwater
Japanese knotweed removal in Ammanford
SA18 · Betws, Tycroes, Capel Hendre, Llandybie
Japanese knotweed removal in Gorseinon
SA4 · Loughor, Penllergaer, Garden Village, Pontarddulais
Japanese knotweed removal in Llantrisant
CF72 · Talbot Green, Pontyclun, Llanharan, Brynsadler
Japanese knotweed removal in Ystradgynlais
SA9 · Abercrave, Cwmtwrch, Lower Cwmtwrch, Penwyllt
Typical South Wales pricing
Herbicide programme
From £1,500
3–5 year treatment with monitoring and guarantee.
Hybrid excavation
From £4,000
Partial dig plus follow-up treatment.
Full excavation
From £8,000
Complete removal with licensed disposal.
Full breakdown in our cost guide, the excavation vs herbicide comparison and our contractor buyer’s guide.
Related invasive weed help for South Wales
Knotweed is rarely the only problem on a South Wales plot. The same crews treat running bamboo in South Wales gardens, giant hogweed on South Wales watercourses and Himalayan balsam along South Wales riverbanks. If you are mid-sale, start with what mortgage lenders require for knotweed and our property survey reports.
Species we treat in South Wales
- Japanese knotweed removal in South Wales — identification, treatment and excavation
- running bamboo removal in South Wales — rhizome excavation and root barriers
- giant hogweed removal in South Wales — safe removal of a burn-causing species
- Himalayan balsam removal in South Wales — riverbank and site-wide clearance
- horsetail (marestail) removal in South Wales — long-term control programmes
- unidentified weeds removal in South Wales — photo guide to every species we treat
Buying, selling or letting in South Wales
- mortgage lender requirements for South Wales property — RICS categories and the paperwork valuers ask for
- insurance claims for South Wales property — policy exclusions and the evidence insurers want
- encroachment and legal advice for South Wales property — nuisance claims and owner obligations
- insurance-backed guarantees for South Wales property — 10-year cover that transfers on sale
- removal costs for South Wales property — survey, treatment and excavation pricing
- excavation vs herbicide for South Wales property — choosing a method for your timescale
Who we work for in South Wales
Counties bordering South Wales
Japanese knotweed removal in Bristol & Avon
Bristol, Bath, Keynsham, Portishead
Japanese knotweed removal in Somerset
Taunton, Bath, Yeovil, Bridgwater
Japanese knotweed removal in Gloucestershire
Gloucester, Cheltenham, Stroud, Cirencester
Japanese knotweed removal in Devon
Exeter, Plymouth, Torquay, Barnstaple
Other counties we cover
Free photo identification in South Wales
Same-day species confirmation from your photographs. On-site professional surveys from £250.